Data.ByteString.Parse

A very simple bytestring parser related to Parsec and Attoparsec

Simple example:

> parse ((,) <$> take 2 <*> byte 0x20 <*> (bytes "abc" *> anyByte)) "xx abctest"
ParseOK "est" ("xx", 116)

Documentation

data Parser a

Simple ByteString parser structure

Instances

Alternative Parser

Monad Parser

Functor Parser

MonadPlus Parser

Applicative Parser

data Result a

Simple parsing result, that represent respectively:

• failure: with the error message
• continuation: that need for more input data
• success: the remaining unparsed data and the parser value

Constructors

ParseFail String

ParseMore (ByteString -> Result a)

ParseOK ByteString a

Instances

Show a => Show (Result a)

run the Parser

parse :: Parser a -> ByteString -> Result a

Run a Parser on a ByteString and return a Result

parseFeed :: Monad m => m ByteString -> Parser a -> ByteString -> m (Result a)

Run a parser on an @initial ByteString.

If the Parser need more data than available, the @feeder function is automatically called and fed to the More continuation.

Parser methods

byte :: Word8 -> Parser ()

Parse a specific byte at current position

if the byte is different than the expected on, this parser will raise a failure.

anyByte :: Parser Word8

Get the next byte from the parser

bytes :: ByteString -> Parser ()

Parse a sequence of bytes from current position

if the following bytes don't match the expected bytestring completely, the parser will raise a failure

take :: Int -> Parser ByteString

Take @n bytes from the current position in the stream

takeWhile :: (Word8 -> Bool) -> Parser ByteString

Take bytes while the @predicate hold from the current position in the stream

takeAll :: Parser ByteString

Take the remaining bytes from the current position in the stream

skip :: Int -> Parser ()

Skip @n bytes from the current position in the stream

skipWhile :: (Word8 -> Bool) -> Parser ()

Skip bytes while the @predicate hold from the current position in the stream

skipAll :: Parser ()

Skip all the remaining bytes from the current position in the stream